Allen-Bradley 1771-OW Selectable Contact Output Module

The Allen-Bradley 1771-OW Selectable Contact Output Module is an eight-channel PLC-5 output card whose individual channels can be configured for normally open or normally closed operation, providing eight Form C contacts that switch external field devices. It is designed for use in the 1771 Universal I/O chassis and may be installed in backplanes 1771-A1B, 1771-A2B, 1771-A3B, or 1771-A4B, aligning with the PLC-5 I/O architecture. Each channel operates independently, enabling you to drive relays, contactors, indicator lamps, or other discrete loads with flexible NO/NC control from a single module. The 1771-OW family is documented in Rockwell/Allen-Bradley literature alongside connection diagrams and installation instructions, underscoring its role as a plug-in I/O option within the PLC-5 ecosystem and its distinction as a selectable-contact output module within the 1771 product line.